Support SIP2.0 (RFC3261), TCP/UDP/IP, RTP/RTCP, HTTP, ICMP, ARP/RARP, DNS, DHCP, NTP, PPPoE, STUN, and TFTP etc; Inside Rooter/NAT, gateway and DMZ Port transmit; Support registered to two gatekeepers; Use the DSP CNOS chip to keeping a wonderful...
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VOIP phone, VOIP gateway, USB phone, USB gateway etc....
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